Umori, the Collector (Serialized) [Multiverse Legends] Core Set 2019 Promos all the rivers will be

all the rivers will be yours

Set: Urza's Legacy Type: Artifact Rarity: Rare Cost: {2} Each spell costs {3} more to cast except during its controller's turn

Set: Platinum: Rising Rivals Type: Water Rarity: Holo Rare Retreat cost: 0

where X is the number of spite counters on Curse of Vengeance

Umori, the Collector (Serialized) [Multiverse Legends] Core Set 2019 Promos all the rivers will beSet: Multiverse Legends Type: Legendary Creature Ooze Rarity: Rare Cost: {2}{B G}{B G} Companion Each nonland card in your starting deck shares a card type. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} any time you could cast a sorcery.) As Umori, the Collector enters the battlefield, choose a card type. Spells you cast of the chosen type cost {1} less to cast.